Research Of DC Distribution Network And Planning With Distributed Generation And Energy Storage

In recent years, with the constant expansion of the power system, its security and stability issues have become increasingly prominent, and relying on the stability of the traditional installation equipment to solve this problem has become unrealistic. Coupled with the deteriorating environmental issues, the voice of the people on the renewable energy soaring, a large number of intermittent instability renewable energy scale access to distribution networks, will exchange with the grid will pose serious challenges. To do this, you need the traditional AC distribution network to the DC mode conversion. DC distribution network technology has become the hot issues of the international power industry, which breeds innovation and new industry development opportunities.The combination of large power grids and distributed generation model has excellent performance to save investment, reduce energy consumption and improve power supply reliability and flexibility. The combination of DC distribution network with distributed generation are bound to have these advantages. In recent years, distributed generation by virtue of its many advantages in power system occupied share more and more, and has become an inevitable trend of development of the field of energy. However, the infiltration of a large number of distributed power will bring more uncertainties to the planning and operation of the distribution network. According to the achievement wordwide, this paper researches on the issue about DC distribution network with distributed generation. The DC distribution network,which is less researched in domestic, with a general introduction to topology determine the selected voltage level, the need for its construction, have done a detailed description of distribution network.In contrast to the AC distribution network,this paper analysis the unique advantages of the DC distribution network. Several depth is widely distributed generation technologies based on a detailed introduction to the major role of energy storage devices in DC distribution system reliability and power quality, and analysis of distributed power systemaccess distribution network that may be brought to the planning and operation of the various effects; Classification and comparison of the mathematical model used in the distribution network planning and optimization algorithms on the advantages and disadvantages of various models and solution methods and scope of summary evaluation.